package com.itheima_03;

import java.io.*;

public class CopyAviDemo {
    public static void main(String[] args) throws IOException {
        //记录开始时间
        long startTime = System.currentTimeMillis();

        //复制视频
        //method1();                  //共耗时146158毫秒
        //method2();                  //共耗时527毫秒
        //method3();                    //共耗时：538毫秒
        method4();                      //共耗时：167毫秒

        //记录结束时间
        long endTime = System.currentTimeMillis();
        System.out.println("共耗时：" + (endTime - startTime) + "毫秒");
    }

    //字节缓冲流一次读写一个字节数组
    public static void method4()throws IOException{
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("E:\\itcast\\字节流复制图片.avi"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("myByteStream\\字节流复制图片.avi"));

        byte[] bys = new byte[1024];
        int len;
        while ((len = bis.read(bys))!=-1){
            bos.write(bys,0,len);
        }

        bos.close();
        bis.close();

    }

    //字节缓冲流一次读写一个字节
    public static void method3() throws IOException{
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("E:\\itcast\\字节流复制图片.avi"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("myByteStream\\字节流复制图片.avi"));

        int by;
        while ((by=bis.read())!=-1){
            bos.write(by);
        }

        bos.close();
        bis.close();
    }


    //基本字节流一次读写一个字节数组
    public static void method2() throws IOException{
        //E:\\itcast\\字节流复制图片.avi
        //模块目录下的 字节流复制图片.avi
        FileInputStream fis = new FileInputStream("E:\\itcast\\字节流复制图片.avi");
        FileOutputStream fos = new FileOutputStream("myByteStream\\字节流复制图片.avi");

        byte[] bys = new byte[1024];
        int len;
        while ((len = fis.read(bys))!=-1){
            fos.write(bys,0,len);
        }

        fos.close();
        fis.close();
    }


    //基本字节流一次读写一个字节
    public static void method1() throws IOException {
        //E:\\itcast\\字节流复制图片.avi
        //模块目录下的 字节流复制图片.avi
        FileInputStream fis = new FileInputStream("E:\\itcast\\字节流复制图片.avi");
        FileOutputStream fos = new FileOutputStream("myByteStream\\字节流复制图片.avi");

        int by;
        while ((by = fis.read()) != -1) {
            fos.write(by);
        }

        fos.close();
        fis.close();

    }
}
